Remove the unnecessary brackets
2.31 x 10^-6+3.41 x 10^3
Convert the decimal to a fraction
231/100 x 10^-6 + 3.41 x 10^3
Multiply
231/100 x 1/10^6 + 3.41 x 1000
Combine
231/100 x 1/10^6 + 3410
Calculate
231/(10^2 x 10^6) + 3410
Answer:
231/10^8 + 3410
Hope it helped :)